How To Fix M2778 - Unit & cannot be deleted! It is being used by event &.

SAP Error Message - Details

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 778

• Message text: Unit & cannot be deleted! It is being used by event &.

What causes this issue?

The unit &V1& was created with the event &V3&.
When you deleted the event &V3&, the unit &V1& should have been deleted
as well. This was not possible, however, because it is still being used
by event &V2&.
Your communication structure cannot be deleted, otherwise updating will
be terminated when event &V2& takes place.

System Response

Event &V3& was deleted nevertheless.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M2778 - Unit & cannot be deleted! It is being used by event &. ?

  The SAP error message M2778 indicates that a specific unit of measure (UoM) cannot be deleted because it is currently being used in an event or transaction. This typically occurs in the context of materials management or inventory management within SAP.
  Cause:
  
  Active Usage: The unit of measure is actively being used in various transactions, such as purchase orders, sales orders, inventory records, or other related documents.
  Event Association: The error message specifies that the unit of measure is linked to a particular event, which could be a transaction or a process that is currently active in the system.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Usage:
  
  Check where the unit of measure is being used. You can do this by reviewing related documents or transactions in the system.
  Use transaction codes like MM03 (Display Material) to see if the UoM is assigned to any materials.
  
  
  
  Remove Dependencies:
  
  If the UoM is linked to any active transactions, you will need to either complete, delete, or change those transactions before you can delete the UoM.
  Ensure that there are no open purchase orders, sales orders, or inventory records that reference the UoM.
  
  
  
  Check Event Details:
  
  The error message mentions an event. Investigate what this event is and determine if it can be closed or modified.
  You may need to consult with your SAP functional team or business process owners to understand the implications of removing the UoM.
  
  
  
  Delete UoM:
  
  Once all dependencies are cleared, you can attempt to delete the unit of measure again using the appropriate transaction (e.g., CUNI for unit of measure maintenance).
  
  
  
  Consult Documentation:
  
  If you are unsure about the implications of deleting a unit of measure, refer to SAP documentation or consult with your SAP support team.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CUNI (Maintain Units of Measure), MM03 (Display Material), and ME23N (Display Purchase Order).
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error message.
  User Roles: Ensure you have the necessary authorizations to view and modify the relevant transactions and units of measure.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.